Jump to content

Vidmas30

Members
  • Posts

    136
  • Joined

  • Last visited

  • Days Won

    1

Everything posted by Vidmas30

  1. This happens only wit signals from steam valves, other signals are ok..
  2. Hi, I had the same problem before: Visilogic was working perfectly, done a lot of programs, but once, when I quit Visilogic and tried to open it again (as I understood) before it had canceled, the same textbox started to show every time I tried to start Visilogic. I tried to reinstall, nothing helped, except one thing: to install it o another directory e.g. on another disc. Hope it helps! Bye! Vidmas
  3. Hi, Once again, I have a couple of questions: 1. We have object where I use v570+ATC8. To ATC8 connected 4xTC and 4xAI(4-20mA). I sent specifications to our TC manufacturer and they made 3 TC (K type) sensors of water temperature and 1 TC (K- type) sensor of outdoor temperature. Water sensors are connected with K-type compensating cable (~10m each) and outdoor sensor also with K-type compensating cable ~40m long. When powered, water temperature indication is alright, but outdoor temperature (when in real was 8C) at once showed about 20C, then began to drop and after about couple hours it was indicating ~12C. Why is this error? Because of cable length or it has something to do with sensor? We changed sensor, but it's the same... 2. With the same ATC8, there are connected 4 AI (4-20mA): 2 inputs are speeds of 2xFC, and 2 inputs are the position of valves. FC's are 7.5kw and 2.2kw. They are mounted in cabinet, that stand next to PLC's cabinet (signal cable lenght ~3-4m.). In OFF mode, FC's are powered up, but pumps are not connected (with MC's) to FC output, in RUN mode pump (pumps never work together, but working pump is chosen by season) are connected to FC output. So there's an issue: In fast mode (819 to 4095) of valves position AI, when pump (7.5kW) is not connected to FC , AI's min value shows ~820 units, when pimp connected it drops down to 738 units (when valve closed) when valve is open it shows ~4096 units in both ways. Other valves AI's min value also drops down, but not that much. Is there's any thoughts about this? Checked the groundin, everything seems fine.. Thank you Vidmas
  4. Thanks, Emil, I understood it, when read Pid server's help file:) I have one more question: when assigning operands to Pid server, 32MI's autotune vector has to be the same as in the PLC's PID FB? And what for are operands CVp, CVi, CVd, RSTintgrl? Thank you!
  5. Hi, How long does it usually takes PID to autotune? And is it necessary to connect plc to process to do PID autotune? I have PLC on my desk and just for curiosity started PID autotuning, status =0, so just interesting: is it calculating something or nothing happens..
  6. Hi, Joe, You are right, linear equation I think is will be the best way:) Now I need to figure it out how to make SP change only if outdoor temperature changes by 1 degree, because measurement is by 0.1C
  7. Good evening, I want to ask for advice: now programming heating system, where in MANUAL mode user enter temperature SP (flow temperature) and in AUTO mode user picks (sets) heating curve (attached), and SP changes automatically according outdoor temperature. My question is: I need to "programm" these curves in v570. I have an idea to use datatables where I set assosiations for flow temperature (SP) with outdoor temperature for each curve for example with resolution of 0.5 C (outdoor temperature). Maybe someone has done something similar before, and have some sugestion how else it could be done? Thank you very much! V.S.
  8. Yeah, it's good to tell.. edit in MS Paint:) If it were black/white PLC, then it would be no problem, because I've done it many times. You should try to edit colour images (those in unitronics images folder) with MS Paint.. It's lots of work and time.. But if there's no other way...
  9. Hi, Saragani, I'm programing v570. So how about it? Is there any other way to rotate text or image on HMI? Help!
  10. Hello, Everybody, Simple question: how to rotate text or images on HMI in visilogic? Recently updated to version v8.6.1, but neither in other versions nor in the new one I can't find a tool for rotation. Looked in HELP, there are written: Rotate HMI Element"Select an HMI element, then click the Rotate icon on the HMI toolbar; the image rotates by 90°. Note that there must be sufficient space for the element to rotate." But there's no such icon on a HMI toolbar.. Can someone explain this to me? Thank you!
×
×
  • Create New...